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Letters Patent No. .62,2510, dated February 19,l 1867.

TMPROVEMBNT IN PIPE-TONGS.

:ro ALLwHoM Vnr MAY contenait:

Be itV known that "I, ELIJAH CASH, o f Brooklyn, in the county ofiKings, and Stat'of NewYbx-Lhave Q invented a new and usefulrnprovement `in Pipe-Tongs gland 'I do hereby declare thatthc'following is afull, clear, and exact description of the samefreference being had to `tlie accompanying drawings, making a portion of this specification, iuwhichi Y Figure 1 is a sideview of a pipe-tongseonstructed according to lny invention.

Figure 2 is a partial longitudinal section of the same. i

Similar letters of referenceindicate corresponding parts in both figures.

This invention consists in anovel arrangement of .a pivoted biting jaw and toothed adjustable slide in relation with each other and with the serrated `shank of the fixed jaw of the tongs, and the cam by which the aforesaid `slide is held in position, whereby'the tongs may be very easily and conveniently Vadjusted to any sized of .pipe required, and'whereby a ,veryip'owcrful grip upon the pipe isl secured. i

To enable others to understand the construction and operation of my invention, I-will proceed to describe lit with reference tothe drawings.`

Thefiixed jaw of' the tongs is shown at A, and the inner side or surface thereof is intended to be ina-doiiat, and is situated atan acute angle to the inner side or edge of the shank Athereof, the portion of the said inner edge of the shank'Anearest the ixedjaw A, being serrated, or, in other words, formed with'angular teeth, as represented a't a in the drawing. That end of the yshank A" opposite to that lat which the jaw A is formed, is shapedinto'a handle, as show n at a. 7B represents anadjustable slide, `which -is constructed with a deep slot or groove, which extends 4entirely through the eurer end of said slide, and through which hthe `shank A is passed, the innermostend of the said slot being formed with angular teeth, b, which` interlock o'r t `between the teetl tof the shank A, as shown more clearly' in fig.2. Pivoted in the outer end of theafore said slot by a transverse pin, .c, behind the shank A', is a cam, C, which is so sha-pcd that when the lever c" thereof is in'appsition nearly or quite at right angles to the .aforesaid shank, the slide B will be loosened, so

thatthc teeth b thereof may be brought away'from the toothed or sdrrated edge of'theshankA, and thesaid slide moved longitudinally upon the 'said shank to any desired position according to the `size of pipe to` be turned or acted upon by the tongs, and when Aturned into a position nearly or quite parallel with the shank A,

will foree'the teeth b against the aforesaid toothed or serrated edge ofthe' shank, and thus firmly 4lock ther-slide in positionA upon the saidshank. The biting jaw is shown at D, and has a large slot,` e, formed within its shank Df, us'show'n atf, the opposite end of the shank'D of the jawD being shaped into a handle, L'. The slot eis of such size Yand shape as lto permit thev slide B to work through the same, the said slidelhaving "its innermost end pivoted in the end of the said slot byrncans of a strong transverse pin, as shown 'at g in theV drawings.

i In using 4the tongs,-the slide B is first adjusted at the proper point d pon the shank A', as hereinbeforc fullyset forth. rrJlhe two handles, a b', are grasped in the hand and forced toward euch other, the pipe E being held between the angular inner sides of theiixedjaw A and the shank thereof, Vand the sharp angularedge i .of the lbiting jaw D, as represented in the dra-wing; the btingaction of the said sharp edge of the jaw `D eil'ecti ually preventingv the pipe fromturning within the tongs.' By pivoting the jar? D'to the innermost end of the slide-B, as hereinbefore explained, the jaw D may be made much shorterthan would 'bethe easeif the pivot `thereof was.situted behindthe shank A", and in consequence of this theleverage exerted thereon by the. shank D thereof f is proportionally increased, thus enabling the aforesaid biting jaw to take a very much firxner hold, t.

up'on the-pipe in turning the same.

What I claim as my invention, and desire to secure by Letters Patent, is,4 'The pvoted biting jaw D, and toothed adjustable slide B, in combinutionwth each other, and with the serrated shank of the fixed jaw A, and the locking cam C, substantially as herein set forth for the purpose speciied. ELIJAH CASH.

Witnesses:

JL W. Goonies, Gao. 4A. Risso. 

